Stamp-mill.



E. H. MOYLE.

STAMP MILL.

APPLICATION FILED MAII. 30, I9I4.

Patented Apr. 27, 1915.

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E. H. MOYLE.

STAMP MILL.

APPLICATION FILED MAR. 3o. I9I4.

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EDWARD H. MOYLE, OF LOS ANGELES, CALIFORNIA.

STAMP-NEILL.

To au whom z'tmoy concern: I Be it lrnown that I, EDWARD H. Morris, acitizen of the United States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented a certain nen7 anduseful Improvement in Stamp- Mills, ofy which the following is aspecification.

My invention has relation to an improvement in stamp mills, an object ofthis invention being to provide a mill in which the blow of the stamp onores is increased, without adding dead or gravity weight to the stamp. Y

rllhe invention involves generally the employment of tension springs, soarranged that the full force of tension is exerted, and crystallizationprevented, and in the event of breakage may be readily replaced at smallexpense.

The use of a helical spring in stamp mills is not new, long springs ofmany helices having been applied, but found disadvantageous andtroublesome because of distortion and constant friction on the stampstem, and crystallization due to torsional stress occurring duringcompression. Such torsion, and crystallization resultant therefrom, isespecially noticeable when the spring closely hugs the stamp stem. Whenmade large diametrically, the true plane in compression is not andcannot be preserved, and the spring assumes a snake-like or S form, thehelices being thrown out of alinement relatively to each other, thusadding to the torsional stress and accelerating crystallization.

My invention therefore has for a further object to provide a spring andweight-impelled stamp, on which the full force of the spring is exertedin the direct line of its tension, crystallization is prevented orretarded, and replacement of broken springs readily effected withoutconsiderable expense, time or labor.

These objects are accomplished by the device shown in the accompanyingdrawing representing a preferred form of my invention, and showing in,

Figure 1, a sectional elevation, Fig. 2, a sectional elevation of amodified form. Fig. 3, is a fragmentary detail showing a slightlymodified arrangement, and Fig. 4, is a front elevation of a completestamp mill, showing the invention as embodied therein.

The stamp comprises the usual parts, viz. the stem 1, boss head 2,tappet 3, and shoe 4,

Specication of Letters laten't.v

Patented. Apr. 27, 1915.

Application led. March 30, 1914. Serial No. 828,384.

Varranged for engagement by a revolving vcam 7 mounted on a shaft 8,suitably journaled on frame standards 9. The said stem 1, operates insuitablev guides 10, carried by and adjustable in cross-members l1 and12, of the frame, and comprising several externally threaded, tubularmembers having a nut end 13 for engagement by a wrench, a lock nut 14,serving to lock and hold said members in position of adjustment. On saidstandards 9, are rigidly fixed collars 15, for supporting thecross-member 11, which is held in rigid position by nuts 16 engaging thethreaded ends 17 of said standards, but which, by this construction maybe removed speedily and readily for replacement .of broken parts. Thecross-member 12 may also be removably attached to the standard for thesame purpose. Between the tappet 3 and the'guide in the cross-member 11,and slidably mounted on said stem 1, is a plurality of weights 18, heldapart byy helical springs 19, surrounding said stem. These weights 18,may be provided with annular grooves 20, for the accommodation of theend helix of each spring 19, to keep the same alined and in a fixedposition relatively to the stem. If it be desired to increase the speedof the drop of the stamp to augment the force of the blow, additionalweights 21 and springs 22, may be provided between the guide in thecross-member 12, and the boss head 2, as seen in Fig. 3, an adjustableset collar 23, being preferably provided on the stamp stem to take thestrain incident on the compression of the springs.

When the stamp stem is raised by the cam 7 the springs 19, arecompressed between the slidable weights 18 and the guides 10, and uponthe escape of the cam from the tappet, the stamp is impelled on the dieby the coperative action of the compressed springs and the sldableweights. The springs being short in length and held by said slidableweights against excessive vibration when the stamp strikes the die, thecrystallization of springs is indefinitely retarded, if not prevented.

What I claim, is

1. In a stamp mill, a stamp having a stem, guides for said stem, atappet on said stem, a plurality of springs and slidable weights on stemand between tappet and guide, and a cam for lifting said tappet.

3. In a stamp mill, a stamp having a stem,

an adjustable tappet on said stem, adjustable and removable guides vforsaid stem, an adjustable set collar for said stem, a plurality ofsprings between adjustable tappetV and guide and a plurality of springsbetween adjustable set collar and guide, 'a plu-V rality of weightsslidable on said stem to.

hold said springs, and an actuating cam for raising saidadjustabletappet.

4. In a stamp mill, a stamp having a stem, adjustable guides for saidstem, an adjustable tappet on said stem, springs and slidable weights onsaid stem and above adjustable tappet, and an actuating cam for saidtappet.

5. In a stamp mill, a stem having an adjustably actuated tappet, stemguides above and below said tappet, and a plurality of springs andslidable shock-absorbing weights on stem and interposed between saidtappet and stem guide.

6. In a stamp mill, a stem having an adjustably actuated tappet, and anadjustable set collar, stem guides engaging said stem, a plurality ofsprings and slidable shock- Copies of this patent may be obtained forfive cents each, by addressing the Gommissironer'of Patents.k

able and removable cross members` for supporting said stem havingadjustable and removable guides, an adjustable setV collar on said stem,a plurality of springs and slidablev shock-absorbing weightsV on stembetween the adjustable tappet and set collar and the adjustable andremovable guides-on removable cross members, and actuating means forraising said adjustable tappet.

8. In a stamp mill, the disposition of a series of slidable springscarried by slidableV shock-absorbing and protecting weights on thestamp, said springs and shock-absorbing and protecting weights locatedbetween a cross or support member fastened to standard and a member onthe stamp used to impart reciprocationto said stamp.

In testimony whereof I affix my signature in the presence of twowitnesses.

EDWARD I-I. MOYLE.

`llitnesses Y SAMUELB. GREGORY, Y N. L. PERRY.

Washington, D. C.

